Mining-machine



2 Sheets-Sheet 1.

Y P.' T. CHEW.

MINING MACHINE.

(No Model.)

Yffy-V Patented July 15 u. PETERS Mumia-1601er. wnnwm u c,

sus

v UNITI-:D STATES PATENT OFFICE.

FRANCIS T. CHEW, LOUIS, MISSOURI, ASSIGVNOR OF ONE-HALF-TO THE ELLSWORTHCOALCOMPANY, OFDANVILLE, ILLINOIS.

lMmme-MACHINF..

SPECIFICATION farming partof Letters Patent No. `3o1,9eo,'dated July 15, 1884.

Application filed November 26, lets. @To model.)

l'o-aZZA whom it may concern.- j

Be it known tllat I, FRANcIs T. GHEW, oi the city of St. Louis, in the State of Missouri, have invented a certain new and useful Inlprovement inMining-Machines, of which the following is a full, clear, and exact description, reference being had yto the accompanying drawings,` forming part of this specification, and in which- Figure 1 is a top view. Fig. 2-is aside elevation, part in section. Fig. 3 is a transverse section taken on line 3 3, Fig. 2. Fig. 4 is a similar view taken on line 4 4, Fig. 2. Figs. 5, 6, and 7 are different-'views of the handle for operating the hoisting-screws of the cylinder. Fig. 8 is an enlarged top view of the screws and operating levers and ratchets. Fig. 9 is an enlarged view of the end of the operating bar or rod. Fig. l0 shows a modified form of securing thepick to the piston wherein a lengthening-piece is employed. Fig.. 11 is a side View of my improved lplatform. Fig. l2

' is a longitudinal section of the same,'tak'en on the line 12 12, Fig. 13. j Fig. 13 is a top view of the same, part broken away. Fig. 14is an end view of the same. Fig. 15 is a transverse section taken on the line l5 15, Fig. .13. Fig. 416 is a rear end view of the same. Fig. 17 is a section taken on the line 17 17, Fig. 16.

My invention relates to machines for mining purposes 5 and it consists in features of novelty hereinafter fullydescribed, and pointed out in the claims.

Referring to the drawings, A represents the main cylinder, provided on each side with a vertical hollow projection, B, adaptedto receive a hollow internally-screw-threaded leg,

' C, to which is secured an arbor, D, projecting outward, and forming j ournal-bearin gs for the supporting wheels. (See Figs. 1 and 2.) Vithin the hollow' legs are hoisting and lowering screws/G5, connected to the cylinder at their arms G, secured to their upper ends, (see Figs.

1 and 8,) which are provided with double ratchets or pawls H, `engaging with ratchetthe ratchets in contact with the wheels.

'the track of the mine.

ets orl pawls have stems by which they are pivoted to the levers, and on these stems (sce Fig. 8) are V-shaped 'cams H', against which bear springs H2, secured to the levers, to hold By reversing the pawls or ratchets the screws may be turned in opposite directions, so as to either raise or lower the cylinder, as may be desired.-

The levers are operated to turn the screws by means of a Abar or rod, I, having a slotted head, I', (see Figs. 8 and 9,) to which the adjacent ends of the levers Aare connected by pins or rivets I2. The bar is supported in brackets I3,

`(see Figs. 1 and 2,) and its free end is provided with a pivoted handle, I4, (see Figs. 1, 2, 5, 6, and 7,) by which it is pulled and pushed to operate the levers. The handle, being at the rear end of the machine, is within easy reach of the operator. y

To the front head of the cylinder A is secured a nose, A', through which the rod J' of the piston-J works and is supported. J2 represents a pin secured to the piston-rod, (see Fig. 2,) which works in a slot, A2, in the nose K, and it is slotted and screw-threaded, as

shown in Figs. 2 and 4, and is provided with collars K', for tightening it upon the pick.

In Fig. 10 I have shown alengtheningpiece, K", interposed between the piston-rod and pick for use when desired.

T represents aplatform upon which the machine is supported'when in use. This platform may be inclined, or 4it may be level, and accordingly one or both ends would be supported on rollers T', journaled in a U-shaped frame, T2, and resting upon one ofthe rails of The main frame or platform can be separated from the frame T2 by simply lifting it up, as theyale only connected by projections T3 on`the platform entering sockets in the frame. (See Figs. 16 and 17.) 4.There is a longitudinal opening, U, in the center of the platform,and beneath this opening is a ratchet-bar, U', and two plain bars or strips, U2, supported by pins U3, tting in inclined slots U4 in thek plates.

V represents a block or bar, pivoted at its IOO center to a post, V, secured to the platform. The function oi' this block is to chuck the wheels of the machine, and for this purpose may be turned at any angle to the platform, as shown in Fig. 13. The post V is not rigidly secured to the platform, but simply straddlcs a rib, V2, (see Fig. 15,) so that it can be moved back and forth to change the position of the chuck-block; and it is held at any desired point by a pawl, V3, pivoted thereto, and adapted to engage the ratchet-bar U. lVhen it is desired to move the chuck-block back, the free end of the pawl is raised to disengage it from the ratchet-bar by means of the bars or strips U2, which it overlaps by means of projections V, one or the other of which, as is most convenient, is pulled back and raised by cranks U, secured to the platform. One of the cranks, as shown in Fig. 13, is at the end and the other near the center of the platform, so one will always be within reach.

I claim as my inventionl. In a mining-machine, the combination -ol a frame, hollow vertical projections on the sides of the frame, having vertical openings, hollow internallyscrew-threaded legs within said projections, having journals extending through said openings to receive thc wheels, hoistingscrews to work within, to adjust thc legs, levers connected to the ends of the screws, and an operating-bar connecting the contigw ous ends of the levers, as set forth.

2. In a mining-machine, the combination of a frame, hollow projections on the frame, hol low intcrnally-screw;thrcaded legs within the projections to receive the supporti11g-wheels, hoisting-screws within the legs,ratchetwhcels secured to the screws, lcvcrs having ratchcts or pawls to engage the ratchet-wheels, and a bar connected to the inner ends of the levers, as set forth.

3. In combination with a mining-machine, a platform provided with apivotcd longitudinally-movable chuck-block, and suitable nicchanical means for holdingthe block to any adj ustnient, substantially as and for the purpose set forth.

1. In combination with a mining-machine, a platform provided with an Opening in its center, a ratchet and two plain bars beneath the center, cranks for raising the plain bars, a pivoted chuck-block secured to a sliding post, and a pawl pivotcd to the post, so as to engage thc ratchet-bar, and having projections overlapping the plain bars, all substantially as shown and described, for the purpose set forth.

FRANCIS T. CHEVY.

In presence of- Gno. ll. KNIGHT, 31ml. A. KNIGHT. 

